fbSampleKeyHolder.conf contains line with occasionally missed comment

[pavel-zotov]

(trivial level, absolutely not urgent) File %FB_HOME%\examples\prebuilt\plugins\fbSampleKeyHolder.conf contains line with occasionally missed comment:

# Key - integer value, a key used to "encrypt" database (i.e. when one issues "ALTER DATABASE ENCRYPT ..."
# without KEY clause configuration parameter Key is used). This key can be passed from client to server
by the chain of sample key holders.

#Key = 90